Ages 5+

Solar Crayon Recycler


Get creative with homemade recycled crayons! Make your own crayon recycler, then harness the power of the Sun to transform crayon pieces into custom rainbow crayons. Get started with the materials in the crate, then reuse the mold again and again to recycle worn-out crayons from home.

Why it’s awesome

  1. Engineered for heat

    Clear window and reflective panels trap heat from the Sun.

  2. Colorful, creative reuse

    Flexible mold turns old crayons into 6 fun designs.

  3. Solar science

    Explore solar energy and heat capture.

What’s included?

  • black box

  • rod

  • shelf

  • 2 disks

  • stand

  • 2 crossbars

  • 2 triangles

  • 14 brads

  • sunglasses

  • 6 crayons

  • crayon mold

  • illustrated instruction booklet

Topics explored

  1. Solar energy

  2. Trapping heat

  3. Creative recycling

From the desk of the product designer:

Behind the design

I used no plastic or foam in this crate because I wanted it to be super environmentally friendly. Even the clear window is made from plants!

- KiwiCo Product Designer

By the numbers


Box shape prototypes


Crayons melted in testing


Days spent waiting for a sunny day to test the crate



8 reviews



    I really like how the box can tilt in order to capture the sun at different angles. This not only helps teach about the movement of the Earth throughout the day, but also helps keep the experiment successful in melting the crayons. This has been a big hit. The kids also especially love the hidden Kiwi character in one of the crayon tray slots.



    It is cool because you can make different crayon shapes.



    By far the best crate we’ve gotten! So very cool you can make your own crayons. Wish it were made of sturdier materials though. That cardboard isn’t going to last all that long.



    This was great little project to do! We love making our little recycled Crayons and my 6 year old loved building the recycler



    This is a very cool idea and activity. I used this activity to support the topic of being resourceful (use the sun and perused crayon that we have) and work toward creating something new, while minimizing waste. My 16 years old daughter incorporated her 6 years old brother in the activity.



    We loved this one!!! Easy, but fun to build, the sunglasses are adorable, and it can be used over and over to recycle crayons. The rainbow shaped crayons that popped out were adorable and usable as well.

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